<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/vue.js"></script>
</head>
<body>
<div id="app">
    <input type="text" v-model="msg">
    {{msg}}

</div>
<script>
    let app = new Vue({
       el:"#app",/*操作的是id= app容器中的内容*/
       data:{
           name:"zhangsan",
           age:"12",
           msg:"我的第一个vue"

       }
    });
</script>
</body>
</html>